Why do I have to connect internet to view PDF files on Android tablet?

I keep getting a prompt that forces me to connect to the internet when I try to open PDFs on a Coby tablet at our monthly meeting.  we do not have a wi-fi in our business for security reasons so this is causing us a problem.  I turned off the check for updates and still forcing me to connect.  Coby support directed me to Adobe support.  How can I avoid this?

Are you trying to open LCRM (Live Cyle Rights Management) protected PDF files? Because only those PDF files require authentication over the network before opening. If not using LCRM protected then can you share your PDF file at [email protected], so that we could look into it.

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